Fire-resistant cable tray

Abstract

The utility model discloses a fire -resistant cable bridge, including the utility model discloses a fire -resistant cable bridge, including the U -shaped groove main part of the side plate and bottom plate, the main part adopts double -deck composite structure, including the metal outer structural layer of providing mechanical strength and bearing capacity and the fire -resistant heat -insulation inner structural layer of the close combination with outer structural layer, and is equipped with heat -insulating cavity between both. The inner structural layer is by lightweight aggregate layer, inorganic binder layer and mixed fibre layer in proper order constitutes. Through presetting recess and with outer layer sticking together to form heat -insulating cavity on the inner layer surface, thereby realizes good heat -insulation and fire -resistant performance under the high temperature fire environment, guarantees the operation safety of cable. The utility model discloses reasonable in structure, high in mechanical strength, and excellent in fire -resistant performance, is fit for in tunnel, underground engineering and the electrical system of high safety requirement and promotes the use.

Description

Technical Field

[0001] This utility model relates to fire-resistant cable trays. Background Technology

[0002] Traditional cable trays are usually made of a single layer of metal sheet. Although they can meet the mechanical strength requirements, in a fire environment, metal materials conduct heat quickly, and the cables inside the tray are easily affected by high temperatures and fail, posing a serious safety hazard.

[0003] Some existing fire-resistant cable trays improve their fire resistance by coating the metal layer with a fire-retardant coating or filling it with fire-resistant materials, but they often have the following problems: The refractory material is not firmly bonded to the metal matrix, and it is prone to cracking and falling off after long-term use. Its thermal insulation performance is limited, making it difficult to maintain stable cable operation under sustained high temperatures; The structure is complex, the processing and installation process is complicated, and the cost is high.

[0004] Therefore, there is an urgent need for a fire-resistant cable tray that combines high mechanical strength, excellent thermal insulation performance, and simple structure. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fire-resistant cable tray.

[0006] Fire-resistant cable trays include a U-shaped trough-shaped main body composed of side plates and a bottom plate. The main body adopts a double-layer composite structure, including an outer structural layer that provides mechanical strength and load-bearing capacity, and an inner structural layer that is tightly bonded to the outer structural layer. A heat-insulating cavity is provided between the outer and inner structural layers. The outer structural layer is made of metal material, and the inner structural layer is made of fire-resistant and heat-insulating composite material. The fire-resistant and heat-insulating composite material consists of a lightweight aggregate layer, an inorganic binder layer, and a mixed fiber layer from the inside out. The heat-insulating cavity is formed by pre-setting grooves on the surface of the inner structural layer and then bonding it to the outer structural layer.

[0007] As a further improvement, the outer structural layer is formed by cold rolling and stamping of 1.2mm thick galvanized steel sheet, the inner structural layer is 2.5mm thick, the lightweight aggregate layer of the inner structural layer is expanded perlite or vermiculite, and the mixed fiber layer is aluminum silicate fiber. By limiting the material and thickness parameters, it is ensured that there is both sufficient strength and good heat insulation effect, as well as good processability.

[0008] As a further improvement, the inner surface of the inner structural layer is provided with raised rollers to facilitate cable laying, and the outer surface of the outer structural layer is provided with fin structures to enhance heat dissipation. The raised rollers facilitate cable laying and maintenance and reduce wear; the heat dissipation fins improve the heat dissipation performance of the cable tray under normal operation and extend the cable life.

[0009] As a further improvement, the main body is equipped with a cover plate made of the same metal material as the outer structural layer. The inner surface of the cover plate is bonded with a layer of fire-resistant and heat-insulating composite material with the same structure as the inner structural layer. By setting the cover plate and adding an inner fire-resistant lining, the overall fire resistance is further enhanced, and the cable is protected more comprehensively.

[0010] As a further improvement, the top of the side plate is bent outward horizontally to form a flange for supporting the cover plate. The flange structure supports the cover plate, improving the installation firmness and enhancing the structural stability.

[0011] As a further improvement, the width of the fire-resistant and heat-insulating composite material layer is equal to the inner width of the U-shaped trough body. The cover plate and the flange are connected by screws or magnets, making installation and disassembly quicker and facilitating cable maintenance.

[0012] Beneficial effects: It adopts a double-layer composite structure, with an outer metal layer to ensure load-bearing strength and an inner fire-resistant composite material layer to ensure thermal insulation performance, resulting in a reasonable structure. The design of the heat-insulating cavity effectively slows down heat conduction and significantly improves fire resistance time; The multi-layer composite material of the inner structural layer, consisting of a lightweight aggregate layer, an inorganic binder layer, and a mixed fiber layer, forms a gradient thermal insulation, providing a long-lasting and reliable fireproof effect. Additional structures such as cover plates, rollers, and heat dissipation fins can be configured according to requirements to improve ease of use and heat dissipation effect; It is easy to install and has good prospects for widespread application. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of a fire-resistant cable tray; Figure 2 This is a partial enlarged view of a fire-resistant cable tray; 1. Side plate 2. Bottom plate 3. Outer structural layer 4. Inner structural layer 41. Lightweight aggregate layer 42. Inorganic binder layer 43. Mixed fiber layer 5. Insulation cavity 6. Raised roller 7. Fin 8. Cover plate 9. Flanged edge. Detailed Implementation

[0014] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0015] like Figures 1-2As shown, the fire-resistant cable tray includes a side plate 1, a bottom plate 2, an outer structural layer 3, an inner structural layer 4, a lightweight aggregate layer 41, an inorganic adhesive layer 42, a mixed fiber layer 43, a heat insulation cavity 5, raised rollers 6, fins 7, a cover plate 8, and flanges 9.

[0016] A fire-resistant cable tray has a U-shaped trough structure as its main body. The outer structural layer 3 is made of metal to ensure overall strength and load-bearing capacity. The inner structural layer 4 is a fire-resistant and heat-insulating composite material, which includes, in sequence, a lightweight aggregate layer 41, such as expanded perlite or vermiculite, an inorganic binder layer 42, and a mixed fiber layer 43, such as aluminum silicate fiber. The surface of the inner structural layer 4 has pre-set grooves, which form a heat-insulating cavity 5 after being attached to the outer structural layer 3.

[0017] The outer structural layer 3 is made of 1.2mm thick galvanized steel sheet, cold-rolled and stamped to ensure both strength and ease of processing. The inner structural layer 4 is 2.5mm thick to ensure heat insulation.

[0018] The inner surface of the inner structural layer 4 is provided with raised rollers 6 to facilitate cable laying and reduce wear; the outer surface of the outer structural layer 3 is provided with heat dissipation fins 7 to improve the heat dissipation efficiency of the cable tray during daily operation.

[0019] The main body is equipped with a metal cover plate 8, and the inner surface of the cover plate 8 is bonded with a fire-resistant composite layer to further improve the overall fire resistance. The top of the side plate 1 can be bent outward to form a flange 9 to support the cover plate 8; the cover plate 8 and the flange 9 are connected by screws or magnetic attraction, which is easy to install and has good sealing performance.

[0020] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fire-resistant cable tray, comprising a U-shaped trough body consisting of side plates and a bottom plate, characterized in that, The main body adopts a double-layer composite structure, including an outer structural layer that provides mechanical strength and load-bearing capacity, and an inner structural layer that is tightly bonded to the outer structural layer. A heat-insulating cavity is provided between the outer structural layer and the inner structural layer. The outer structural layer is made of metal material, and the inner structural layer is made of fire-resistant and heat-insulating composite material. The fire-resistant and heat-insulating composite material consists of a lightweight aggregate layer, an inorganic binder layer, and a mixed fiber layer from the inside to the outside. The heat-insulating cavity is formed by pre-setting grooves on the surface of the inner structural layer and then bonding it to the outer structural layer.

2. The fire-resistant cable tray according to claim 1, characterized in that, The outer structural layer is formed by cold rolling and stamping of 1.2mm thick galvanized steel sheet, the inner structural layer is 2.5mm thick, the lightweight aggregate layer of the inner structural layer is expanded perlite or vermiculite, and the mixed fiber layer is aluminum silicate fiber.

3. The fire-resistant cable tray according to claim 1, characterized in that, The inner surface of the inner structural layer is provided with raised rollers to facilitate cable laying, and the outer surface of the outer structural layer is provided with fin structures to enhance heat dissipation.

4. The fire-resistant cable tray according to claim 1, characterized in that, The main body is equipped with a cover plate, which is made of the same metal material as the outer structural layer, and the inner surface of the cover plate is bonded with a layer of fire-resistant and heat-insulating composite material with the same structure as the inner structural layer.

5. The fire-resistant cable tray according to claim 4, characterized in that, The top of the side plate is bent outward horizontally to form a flange for supporting the cover plate.

6. The fire-resistant cable tray according to claim 5, characterized in that, The width of the fire-resistant and heat-insulating composite material layer is equal to the inner width of the U-shaped groove body, and the cover plate and the flange are connected by screws or magnets.

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